Display screen or portion thereof with graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with a user interface;

FIG. 2 is a front view of the display screen or portion thereof with the graphical user interface of FIG. 1 in a different environment than shown in FIG. 1;

FIG. 3 is a front view of the display screen or portion thereof with the graphical user interface of FIG. 1 in a different environment than shown in FIG. 1; and,

FIG. 4 is a front view of the display screen or portion thereof with the graphical user interface of FIG. 1 in a different environment than shown in FIG. 1.

The features shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 